Guitar Scales: A Practical Guide to Understanding the Guitar Fretboard

Practical Theory for Guitar: A Player’s Guide to Essential Music Theory in Words, Music, Tablature, and Sound, Book & CD

All about Music Theory: A Fun and Simple Guide to Understanding Music

Guitar: Fretboard Mastery: An In-Depth Guide to Playing Guitar with Ease, Including Note Memorization, Music Theory for Beginners, Chords, Scales and Technical Exercises

Basic Music Theory, 4th ed.: How to Read, Write, and Understand Written Music